libobs: Move windows headers to WIN32 section in cmake file

These were in the APPLE section by mistake

libobs/CMakeLists.txt

@@ -58,6 +58,12 @@ if(WIN32)
 		util/threading-windows.c
 		util/pipe-windows.c
 		util/platform-windows.c)
+	set(libobs_PLATFORM_HEADERS
+		util/windows/win-version.h
+		util/windows/ComPtr.hpp
+		util/windows/CoTaskMemPtr.hpp
+		util/windows/HRError.hpp
+		util/windows/WinHandle.hpp)
 	set(libobs_PLATFORM_DEPS winmm)
 	if(MSVC)
 		set(libobs_PLATFORM_DEPS
@@ -71,12 +77,6 @@ elseif(APPLE)
 		util/pipe-posix.c
 		util/platform-nix.c
 		util/platform-cocoa.m)
-	set(libobs_PLATFORM_HEADERS
-		util/windows/win-version.h
-		util/windows/ComPtr.hpp
-		util/windows/CoTaskMemPtr.hpp
-		util/windows/HRError.hpp
-		util/windows/WinHandle.hpp)
 
 	set_source_files_properties(${libobs_PLATFORM_SOURCES}
 		PROPERTIES